package org.bouncycastle.crypto.digests;

/**
 * implementation of RIPEMD 320.
 * <p>
 * <b>Note:</b> this implementation offers the same level of security as RIPEMD 160.
 */
public class RIPEMD320Digest extends GeneralDigest {
    private static final int DIGEST_LENGTH = 40;

    private int H0, H1, H2, H3, H4, H5, H6, H7, H8, H9; // IV's

    private int[] X = new int[16];
    private int xOff;

    /**
     * Standard constructor
     */
    public RIPEMD320Digest() {
        reset();
    }

    /**
     * Copy constructor. This will copy the state of the provided message digest.
     */
    public RIPEMD320Digest(RIPEMD320Digest t) {
        super(t);

        H0 = t.H0;
        H1 = t.H1;
        H2 = t.H2;
        H3 = t.H3;
        H4 = t.H4;
        H5 = t.H5;
        H6 = t.H6;
        H7 = t.H7;
        H8 = t.H8;
        H9 = t.H9;

        System.arraycopy(t.X, 0, X, 0, t.X.length);
        xOff = t.xOff;
    }

    public String getAlgorithmName() {
        return "RIPEMD320";
    }

    public int getDigestSize() {
        return DIGEST_LENGTH;
    }

    protected void processWord(byte[] in, int inOff) {
        X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8) | ((in[inOff + 2] & 0xff) << 16) | ((in[inOff + 3] & 0xff) << 24);

        if (xOff == 16) {
            processBlock();
        }
    }

    protected void processLength(long bitLength) {
        if (xOff > 14) {
            processBlock();
        }

        X[14] = (int) (bitLength & 0xffffffff);
        X[15] = (int) (bitLength >>> 32);
    }

    private void unpackWord(int word, byte[] out, int outOff) {
        out[outOff] = (byte) word;
        out[outOff + 1] = (byte) (word >>> 8);
        out[outOff + 2] = (byte) (word >>> 16);
        out[outOff + 3] = (byte) (word >>> 24);
    }

    public int doFinal(byte[] out, int outOff) {
        finish();

        unpackWord(H0, out, outOff);
        unpackWord(H1, out, outOff + 4);
        unpackWord(H2, out, outOff + 8);
        unpackWord(H3, out, outOff + 12);
        unpackWord(H4, out, outOff + 16);
        unpackWord(H5, out, outOff + 20);
        unpackWord(H6, out, outOff + 24);
        unpackWord(H7, out, outOff + 28);
        unpackWord(H8, out, outOff + 32);
        unpackWord(H9, out, outOff + 36);

        reset();

        return DIGEST_LENGTH;
    }

    /**
     * reset the chaining variables to the IV values.
     */
    public void reset() {
        super.reset();

        H0 = 0x67452301;
        H1 = 0xefcdab89;
        H2 = 0x98badcfe;
        H3 = 0x10325476;
        H4 = 0xc3d2e1f0;
        H5 = 0x76543210;
        H6 = 0xFEDCBA98;
        H7 = 0x89ABCDEF;
        H8 = 0x01234567;
        H9 = 0x3C2D1E0F;

        xOff = 0;

        for (int i = 0; i != X.length; i++) {
            X[i] = 0;
        }
    }

    /*
     * rotate int x left n bits.
     */
    private final int RL(int x, int n) {
        return (x << n) | (x >>> (32 - n));
    }

    /*
     * f1,f2,f3,f4,f5 are the basic RIPEMD160 functions.
     */

    /*
     * rounds 0-15
     */
    private final int f1(int x, int y, int z) {
        return x ^ y ^ z;
    }

    /*
     * rounds 16-31
     */
    private final int f2(int x, int y, int z) {
        return (x & y) | (~x & z);
    }

    /*
     * rounds 32-47
     */
    private final int f3(int x, int y, int z) {
        return (x | ~y) ^ z;
    }

    /*
     * rounds 48-63
     */
    private final int f4(int x, int y, int z) {
        return (x & z) | (y & ~z);
    }

    /*
     * rounds 64-79
     */
    private final int f5(int x, int y, int z) {
        return x ^ (y | ~z);
    }

    protected void processBlock() {
        int a, aa;
        int b, bb;
        int c, cc;
        int d, dd;
        int e, ee;
        int t;

        a = H0;
        b = H1;
        c = H2;
        d = H3;
        e = H4;
        aa = H5;
        bb = H6;
        cc = H7;
        dd = H8;
        ee = H9;

        //
        // Rounds 1 - 16
        //
        // left
        a = RL(a + f1(b, c, d) + X[0], 11) + e;
        c = RL(c, 10);
        e = RL(e + f1(a, b, c) + X[1], 14) + d;
        b = RL(b, 10);
        d = RL(d + f1(e, a, b) + X[2], 15) + c;
        a = RL(a, 10);
        c = RL(c + f1(d, e, a) + X[3], 12) + b;
        e = RL(e, 10);
        b = RL(b + f1(c, d, e) + X[4], 5) + a;
        d = RL(d, 10);
        a = RL(a + f1(b, c, d) + X[5], 8) + e;
        c = RL(c, 10);
        e = RL(e + f1(a, b, c) + X[6], 7) + d;
        b = RL(b, 10);
        d = RL(d + f1(e, a, b) + X[7], 9) + c;
        a = RL(a, 10);
        c = RL(c + f1(d, e, a) + X[8], 11) + b;
        e = RL(e, 10);
        b = RL(b + f1(c, d, e) + X[9], 13) + a;
        d = RL(d, 10);
        a = RL(a + f1(b, c, d) + X[10], 14) + e;
        c = RL(c, 10);
        e = RL(e + f1(a, b, c) + X[11], 15) + d;
        b = RL(b, 10);
        d = RL(d + f1(e, a, b) + X[12], 6) + c;
        a = RL(a, 10);
        c = RL(c + f1(d, e, a) + X[13], 7) + b;
        e = RL(e, 10);
        b = RL(b + f1(c, d, e) + X[14], 9) + a;
        d = RL(d, 10);
        a = RL(a + f1(b, c, d) + X[15], 8) + e;
        c = RL(c, 10);

        // right
        aa = RL(aa + f5(bb, cc, dd) + X[5] + 0x50a28be6, 8) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f5(aa, bb, cc) + X[14] + 0x50a28be6, 9) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f5(ee, aa, bb) + X[7] + 0x50a28be6, 9) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f5(dd, ee, aa) + X[0] + 0x50a28be6, 11) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f5(cc, dd, ee) + X[9] + 0x50a28be6, 13) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f5(bb, cc, dd) + X[2] + 0x50a28be6, 15) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f5(aa, bb, cc) + X[11] + 0x50a28be6, 15) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f5(ee, aa, bb) + X[4] + 0x50a28be6, 5) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f5(dd, ee, aa) + X[13] + 0x50a28be6, 7) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f5(cc, dd, ee) + X[6] + 0x50a28be6, 7) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f5(bb, cc, dd) + X[15] + 0x50a28be6, 8) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f5(aa, bb, cc) + X[8] + 0x50a28be6, 11) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f5(ee, aa, bb) + X[1] + 0x50a28be6, 14) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f5(dd, ee, aa) + X[10] + 0x50a28be6, 14) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f5(cc, dd, ee) + X[3] + 0x50a28be6, 12) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f5(bb, cc, dd) + X[12] + 0x50a28be6, 6) + ee;
        cc = RL(cc, 10);

        t = a;
        a = aa;
        aa = t;

        //
        // Rounds 16-31
        //
        // left
        e = RL(e + f2(a, b, c) + X[7] + 0x5a827999, 7) + d;
        b = RL(b, 10);
        d = RL(d + f2(e, a, b) + X[4] + 0x5a827999, 6) + c;
        a = RL(a, 10);
        c = RL(c + f2(d, e, a) + X[13] + 0x5a827999, 8) + b;
        e = RL(e, 10);
        b = RL(b + f2(c, d, e) + X[1] + 0x5a827999, 13) + a;
        d = RL(d, 10);
        a = RL(a + f2(b, c, d) + X[10] + 0x5a827999, 11) + e;
        c = RL(c, 10);
        e = RL(e + f2(a, b, c) + X[6] + 0x5a827999, 9) + d;
        b = RL(b, 10);
        d = RL(d + f2(e, a, b) + X[15] + 0x5a827999, 7) + c;
        a = RL(a, 10);
        c = RL(c + f2(d, e, a) + X[3] + 0x5a827999, 15) + b;
        e = RL(e, 10);
        b = RL(b + f2(c, d, e) + X[12] + 0x5a827999, 7) + a;
        d = RL(d, 10);
        a = RL(a + f2(b, c, d) + X[0] + 0x5a827999, 12) + e;
        c = RL(c, 10);
        e = RL(e + f2(a, b, c) + X[9] + 0x5a827999, 15) + d;
        b = RL(b, 10);
        d = RL(d + f2(e, a, b) + X[5] + 0x5a827999, 9) + c;
        a = RL(a, 10);
        c = RL(c + f2(d, e, a) + X[2] + 0x5a827999, 11) + b;
        e = RL(e, 10);
        b = RL(b + f2(c, d, e) + X[14] + 0x5a827999, 7) + a;
        d = RL(d, 10);
        a = RL(a + f2(b, c, d) + X[11] + 0x5a827999, 13) + e;
        c = RL(c, 10);
        e = RL(e + f2(a, b, c) + X[8] + 0x5a827999, 12) + d;
        b = RL(b, 10);

        // right
        ee = RL(ee + f4(aa, bb, cc) + X[6] + 0x5c4dd124, 9) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f4(ee, aa, bb) + X[11] + 0x5c4dd124, 13) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f4(dd, ee, aa) + X[3] + 0x5c4dd124, 15) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f4(cc, dd, ee) + X[7] + 0x5c4dd124, 7) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f4(bb, cc, dd) + X[0] + 0x5c4dd124, 12) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f4(aa, bb, cc) + X[13] + 0x5c4dd124, 8) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f4(ee, aa, bb) + X[5] + 0x5c4dd124, 9) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f4(dd, ee, aa) + X[10] + 0x5c4dd124, 11) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f4(cc, dd, ee) + X[14] + 0x5c4dd124, 7) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f4(bb, cc, dd) + X[15] + 0x5c4dd124, 7) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f4(aa, bb, cc) + X[8] + 0x5c4dd124, 12) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f4(ee, aa, bb) + X[12] + 0x5c4dd124, 7) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f4(dd, ee, aa) + X[4] + 0x5c4dd124, 6) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f4(cc, dd, ee) + X[9] + 0x5c4dd124, 15) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f4(bb, cc, dd) + X[1] + 0x5c4dd124, 13) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f4(aa, bb, cc) + X[2] + 0x5c4dd124, 11) + dd;
        bb = RL(bb, 10);

        t = b;
        b = bb;
        bb = t;

        //
        // Rounds 32-47
        //
        // left
        d = RL(d + f3(e, a, b) + X[3] + 0x6ed9eba1, 11) + c;
        a = RL(a, 10);
        c = RL(c + f3(d, e, a) + X[10] + 0x6ed9eba1, 13) + b;
        e = RL(e, 10);
        b = RL(b + f3(c, d, e) + X[14] + 0x6ed9eba1, 6) + a;
        d = RL(d, 10);
        a = RL(a + f3(b, c, d) + X[4] + 0x6ed9eba1, 7) + e;
        c = RL(c, 10);
        e = RL(e + f3(a, b, c) + X[9] + 0x6ed9eba1, 14) + d;
        b = RL(b, 10);
        d = RL(d + f3(e, a, b) + X[15] + 0x6ed9eba1, 9) + c;
        a = RL(a, 10);
        c = RL(c + f3(d, e, a) + X[8] + 0x6ed9eba1, 13) + b;
        e = RL(e, 10);
        b = RL(b + f3(c, d, e) + X[1] + 0x6ed9eba1, 15) + a;
        d = RL(d, 10);
        a = RL(a + f3(b, c, d) + X[2] + 0x6ed9eba1, 14) + e;
        c = RL(c, 10);
        e = RL(e + f3(a, b, c) + X[7] + 0x6ed9eba1, 8) + d;
        b = RL(b, 10);
        d = RL(d + f3(e, a, b) + X[0] + 0x6ed9eba1, 13) + c;
        a = RL(a, 10);
        c = RL(c + f3(d, e, a) + X[6] + 0x6ed9eba1, 6) + b;
        e = RL(e, 10);
        b = RL(b + f3(c, d, e) + X[13] + 0x6ed9eba1, 5) + a;
        d = RL(d, 10);
        a = RL(a + f3(b, c, d) + X[11] + 0x6ed9eba1, 12) + e;
        c = RL(c, 10);
        e = RL(e + f3(a, b, c) + X[5] + 0x6ed9eba1, 7) + d;
        b = RL(b, 10);
        d = RL(d + f3(e, a, b) + X[12] + 0x6ed9eba1, 5) + c;
        a = RL(a, 10);

        // right
        dd = RL(dd + f3(ee, aa, bb) + X[15] + 0x6d703ef3, 9) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f3(dd, ee, aa) + X[5] + 0x6d703ef3, 7) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f3(cc, dd, ee) + X[1] + 0x6d703ef3, 15) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f3(bb, cc, dd) + X[3] + 0x6d703ef3, 11) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f3(aa, bb, cc) + X[7] + 0x6d703ef3, 8) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f3(ee, aa, bb) + X[14] + 0x6d703ef3, 6) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f3(dd, ee, aa) + X[6] + 0x6d703ef3, 6) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f3(cc, dd, ee) + X[9] + 0x6d703ef3, 14) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f3(bb, cc, dd) + X[11] + 0x6d703ef3, 12) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f3(aa, bb, cc) + X[8] + 0x6d703ef3, 13) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f3(ee, aa, bb) + X[12] + 0x6d703ef3, 5) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f3(dd, ee, aa) + X[2] + 0x6d703ef3, 14) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f3(cc, dd, ee) + X[10] + 0x6d703ef3, 13) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f3(bb, cc, dd) + X[0] + 0x6d703ef3, 13) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f3(aa, bb, cc) + X[4] + 0x6d703ef3, 7) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f3(ee, aa, bb) + X[13] + 0x6d703ef3, 5) + cc;
        aa = RL(aa, 10);

        t = c;
        c = cc;
        cc = t;

        //
        // Rounds 48-63
        //
        // left
        c = RL(c + f4(d, e, a) + X[1] + 0x8f1bbcdc, 11) + b;
        e = RL(e, 10);
        b = RL(b + f4(c, d, e) + X[9] + 0x8f1bbcdc, 12) + a;
        d = RL(d, 10);
        a = RL(a + f4(b, c, d) + X[11] + 0x8f1bbcdc, 14) + e;
        c = RL(c, 10);
        e = RL(e + f4(a, b, c) + X[10] + 0x8f1bbcdc, 15) + d;
        b = RL(b, 10);
        d = RL(d + f4(e, a, b) + X[0] + 0x8f1bbcdc, 14) + c;
        a = RL(a, 10);
        c = RL(c + f4(d, e, a) + X[8] + 0x8f1bbcdc, 15) + b;
        e = RL(e, 10);
        b = RL(b + f4(c, d, e) + X[12] + 0x8f1bbcdc, 9) + a;
        d = RL(d, 10);
        a = RL(a + f4(b, c, d) + X[4] + 0x8f1bbcdc, 8) + e;
        c = RL(c, 10);
        e = RL(e + f4(a, b, c) + X[13] + 0x8f1bbcdc, 9) + d;
        b = RL(b, 10);
        d = RL(d + f4(e, a, b) + X[3] + 0x8f1bbcdc, 14) + c;
        a = RL(a, 10);
        c = RL(c + f4(d, e, a) + X[7] + 0x8f1bbcdc, 5) + b;
        e = RL(e, 10);
        b = RL(b + f4(c, d, e) + X[15] + 0x8f1bbcdc, 6) + a;
        d = RL(d, 10);
        a = RL(a + f4(b, c, d) + X[14] + 0x8f1bbcdc, 8) + e;
        c = RL(c, 10);
        e = RL(e + f4(a, b, c) + X[5] + 0x8f1bbcdc, 6) + d;
        b = RL(b, 10);
        d = RL(d + f4(e, a, b) + X[6] + 0x8f1bbcdc, 5) + c;
        a = RL(a, 10);
        c = RL(c + f4(d, e, a) + X[2] + 0x8f1bbcdc, 12) + b;
        e = RL(e, 10);

        // right
        cc = RL(cc + f2(dd, ee, aa) + X[8] + 0x7a6d76e9, 15) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f2(cc, dd, ee) + X[6] + 0x7a6d76e9, 5) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f2(bb, cc, dd) + X[4] + 0x7a6d76e9, 8) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f2(aa, bb, cc) + X[1] + 0x7a6d76e9, 11) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f2(ee, aa, bb) + X[3] + 0x7a6d76e9, 14) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f2(dd, ee, aa) + X[11] + 0x7a6d76e9, 14) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f2(cc, dd, ee) + X[15] + 0x7a6d76e9, 6) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f2(bb, cc, dd) + X[0] + 0x7a6d76e9, 14) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f2(aa, bb, cc) + X[5] + 0x7a6d76e9, 6) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f2(ee, aa, bb) + X[12] + 0x7a6d76e9, 9) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f2(dd, ee, aa) + X[2] + 0x7a6d76e9, 12) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f2(cc, dd, ee) + X[13] + 0x7a6d76e9, 9) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f2(bb, cc, dd) + X[9] + 0x7a6d76e9, 12) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f2(aa, bb, cc) + X[7] + 0x7a6d76e9, 5) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f2(ee, aa, bb) + X[10] + 0x7a6d76e9, 15) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f2(dd, ee, aa) + X[14] + 0x7a6d76e9, 8) + bb;
        ee = RL(ee, 10);

        t = d;
        d = dd;
        dd = t;

        //
        // Rounds 64-79
        //
        // left
        b = RL(b + f5(c, d, e) + X[4] + 0xa953fd4e, 9) + a;
        d = RL(d, 10);
        a = RL(a + f5(b, c, d) + X[0] + 0xa953fd4e, 15) + e;
        c = RL(c, 10);
        e = RL(e + f5(a, b, c) + X[5] + 0xa953fd4e, 5) + d;
        b = RL(b, 10);
        d = RL(d + f5(e, a, b) + X[9] + 0xa953fd4e, 11) + c;
        a = RL(a, 10);
        c = RL(c + f5(d, e, a) + X[7] + 0xa953fd4e, 6) + b;
        e = RL(e, 10);
        b = RL(b + f5(c, d, e) + X[12] + 0xa953fd4e, 8) + a;
        d = RL(d, 10);
        a = RL(a + f5(b, c, d) + X[2] + 0xa953fd4e, 13) + e;
        c = RL(c, 10);
        e = RL(e + f5(a, b, c) + X[10] + 0xa953fd4e, 12) + d;
        b = RL(b, 10);
        d = RL(d + f5(e, a, b) + X[14] + 0xa953fd4e, 5) + c;
        a = RL(a, 10);
        c = RL(c + f5(d, e, a) + X[1] + 0xa953fd4e, 12) + b;
        e = RL(e, 10);
        b = RL(b + f5(c, d, e) + X[3] + 0xa953fd4e, 13) + a;
        d = RL(d, 10);
        a = RL(a + f5(b, c, d) + X[8] + 0xa953fd4e, 14) + e;
        c = RL(c, 10);
        e = RL(e + f5(a, b, c) + X[11] + 0xa953fd4e, 11) + d;
        b = RL(b, 10);
        d = RL(d + f5(e, a, b) + X[6] + 0xa953fd4e, 8) + c;
        a = RL(a, 10);
        c = RL(c + f5(d, e, a) + X[15] + 0xa953fd4e, 5) + b;
        e = RL(e, 10);
        b = RL(b + f5(c, d, e) + X[13] + 0xa953fd4e, 6) + a;
        d = RL(d, 10);

        // right
        bb = RL(bb + f1(cc, dd, ee) + X[12], 8) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f1(bb, cc, dd) + X[15], 5) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f1(aa, bb, cc) + X[10], 12) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f1(ee, aa, bb) + X[4], 9) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f1(dd, ee, aa) + X[1], 12) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f1(cc, dd, ee) + X[5], 5) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f1(bb, cc, dd) + X[8], 14) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f1(aa, bb, cc) + X[7], 6) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f1(ee, aa, bb) + X[6], 8) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f1(dd, ee, aa) + X[2], 13) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f1(cc, dd, ee) + X[13], 6) + aa;
        dd = RL(dd, 10);
        aa = RL(aa + f1(bb, cc, dd) + X[14], 5) + ee;
        cc = RL(cc, 10);
        ee = RL(ee + f1(aa, bb, cc) + X[0], 15) + dd;
        bb = RL(bb, 10);
        dd = RL(dd + f1(ee, aa, bb) + X[3], 13) + cc;
        aa = RL(aa, 10);
        cc = RL(cc + f1(dd, ee, aa) + X[9], 11) + bb;
        ee = RL(ee, 10);
        bb = RL(bb + f1(cc, dd, ee) + X[11], 11) + aa;
        dd = RL(dd, 10);

        //
        // do (e, ee) swap as part of assignment.
        //

        H0 += a;
        H1 += b;
        H2 += c;
        H3 += d;
        H4 += ee;
        H5 += aa;
        H6 += bb;
        H7 += cc;
        H8 += dd;
        H9 += e;

        //
        // reset the offset and clean out the word buffer.
        //
        xOff = 0;
        for (int i = 0; i != X.length; i++) {
            X[i] = 0;
        }
    }
}
